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A method for indoor people counting based on radio frequency identification technology

It is a radio frequency identification technology and indoor population technology, which is applied in character and pattern recognition, calculation, computer parts and other directions, and can solve problems such as unsatisfactory detection effect and sensitive environmental lighting conditions, so as to protect citizens' privacy, ensure privacy security, and make good statistics effect of effect

Active Publication Date: 2020-04-24
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the existing indoor people counting methods are mainly based on video surveillance systems, which are sensitive to the lighting conditions of the environment, and the detection effect is not satisfactory when the monitoring scene environment is complex and the target is seriously occluded.

Method used

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  • A method for indoor people counting based on radio frequency identification technology
  • A method for indoor people counting based on radio frequency identification technology
  • A method for indoor people counting based on radio frequency identification technology

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Embodiment

[0055] Clustering is to divide similar objects into different groups or more subsets through static classification, so that the member objects in the same subset have similar attributes. In the present invention, the tags on the same person will have similar attributes when they are active in the scene, and the time t 0 Slice the entire reading time T = 10 minutes as a unit. Since there are 60 people in the scene, and each person carries 3 to 5 tags, there are about 200 tags in the environment. Considering the reading efficiency of the reader, select t 0 =0.5s, it can ensure that each tag can be effectively read within a time slice. Then read each time slice to the antenna number of the tag to form a set s i , so as to get the feature vector of the label Attributes available as tags.

[0056] In order to cluster labels, the distance between two label feature vectors needs to be defined. Hausdorff distance is a measure to describe the degree of similarity between two sets ...

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Abstract

The invention discloses an indoor people counting method based on radio frequency identification technology. Several RFID readers are deployed indoors to ensure that the reading range properly covers the indoor area, and then people carrying a certain amount of RFID tags move freely in the scene. Each tag will be read by several antennas within a certain period of time. Starting from the time dimension, a collection sequence of read antennas can be obtained. For the tags on the same person, the closer their reading antenna set sequences corresponding to time are, according to this characteristic and using a clustering algorithm based on density and distance, the number of people in the scene can be counted.

Description

technical field [0001] The invention relates to an indoor people counting method, in particular to an indoor people counting method based on radio frequency identification technology. Background technique [0002] RFID (Radio Frequency Identification) technology is an automatic identification technology based on wireless communication technology. Its basic principle is to use the radio frequency signal and space coupling transmission characteristics to automatically identify the information carried by the identified object. Its biggest advantage is non-contact Recognize, and can identify multiple targets. RFID technology is currently being more and more widely used in various industries, including supply chain management, warehouse inventory, electronic payment, security access control, target monitoring and tracking, etc. [0003] People counting technology has been gradually applied to a variety of public places with a large flow of people, such as supermarkets, schools, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K7/00G06K9/62
CPCG06K7/0008G06F18/23
Inventor 刘佳陈力军郁裕杰陈星宇张晓聪李珍珠严颖丽边星宇许林龚华林程唯
Owner NANJING UNIV
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